when were bomber planes invented

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
when were bomber planes invented	0.96	0.8	1800	89	32
when	1.63	0.8	4398	43	4
were	1.49	1	3297	14	4
bomber	1.44	1	9571	80	6
planes	0.84	0.8	4041	80	6
invented	0.21	0.4	6974	28	8

Keyword	CPC	PCC	Volume	Score
when were bomber planes invented	1.45	0.7	6819	26
when were bombers invented	1.58	0.2	8127	87
when was the first bomber made	0.77	0.8	4763	99
history of us bomber aircraft	1.62	0.1	4387	51
what was the first bomber plane	1.72	1	5716	80
when were the planes invented	0.94	0.9	6487	73
when were planes invented in history	1.93	1	2754	91
what year were planes invented	0.18	0.9	1462	6
what was the first bomber	1.13	0.6	5827	87
what was the first jet bomber	0.17	0.8	2783	9
facts about bomber planes	1.96	0.9	9887	24
who created the first four-engined bomber	1.51	1	7357	26
air force bomber history	0.74	1	7030	91
history of us bombers	0.99	0.4	4665	86